Medium Bubbles: The aerator balls produce plenty of dense bubbles. A great way to increase oxygen solubility in your aquarium and energize aquatic life. Reliable Material: Constructed from mineral material and sintered at high temperature Ideal for aerating in an aquarium, DWC system or pond Lasts Fish or root grow healthily Stable in the water: Well weighted to sink to the bottom and lay stably in your tank without floating Easy to use: Soak the rock Soak completely in water for 1 hour before use. Clean it regularly with a brush as it gets clogged after weeks or months of use
